MULTI-COMPONENT SUPERCRITICAL THERMAL FLUID GENERATION SYSTEM AND METHOD WITH SEGMENTED AIR SUPPLY

Abstract

Present disclosure a multi-component supercritical thermal fluid generation system and method with segmented air supply. The outlet of a water tank is communicated with the preheated water inlet of a multi-component supercritical thermal fluid generator body, the preheated water outlet of the multi-component supercritical thermal fluid generator body is communicated with the cold fluid inlet of a heat exchanger, the product outlet at the upper part of the multi-component supercritical thermal fluid generator body is communicated with the thermal fluid inlet of the heat exchanger, and the slag outlet at the lower part of the multi-component supercritical thermal fluid generator body is communicated with the inlet of a slag discharge lock hopper. Through the reasonable coupling design of the supercritical water gasification heat absorption zone and the oxidation reaction heat release zone in the multi-component thermal fluid generator, the self-heating of the multi-component supercritical thermal fluid generation system is realized.

Claims

1. A multi-component supercritical thermal fluid generation system with segmented air supply, comprising a multi-component supercritical thermal fluid generator body (22), a heat exchanger (6), a gas-liquid separator (11), a water tank (12), a storage tank (4), a slag discharge lock hopper (14) and an air compressor (1); wherein a preheated water inlet of the multi-component supercritical thermal fluid generator body (22) is communicated with the water tank (12); a preheated water outlet of the multi-component supercritical thermal fluid generator body (22) is communicated with a cold fluid inlet of the heat exchanger (6); a heat exchange sleeve (15) is provided in the multi-component supercritical thermal fluid generator body (22), an air delivery pipe (17) is provided in the heat exchange sleeve (15), and a spiral pipe (16) is wound around the air delivery pipe (17); a cold fluid outlet of the heat exchanger (6) is communicated with an inlet of the spiral pipe (16), and an outlet of the spiral pipe (16) is communicated with a preheated water inlet of the heat exchange sleeve (15); an outlet of the storage tank (4) is communicated with a material inlet provided on the multi-component supercritical thermal fluid generator body (22); an outlet of the air compressor (1) is respectively communicated with an upper air inlet and a lower air inlet of the air delivery pipe (17); a product outlet at an upper part of the multi-component supercritical thermal fluid generator body (22) is communicated with a thermal fluid inlet of the heat exchanger (6), and a slag outlet at a lower part is communicated with an inlet of the slag discharge lock hopper (14); a thermal fluid outlet of that heat exchange (6) is divided into two path, one path is communicated with the gas-liquid separator (11) through a cooler (9), and the other path is connected with an inlet of a multi-component supercritical thermal fluid injection well (7); a liquid product outlet of the gas separator (11) is communicated with an inlet of the water tank (12); an air supply unit is provided in the multi-component supercritical thermal fluid generator body (22), so as to realize segmented air supply in the multi-component supercritical thermal fluid generator body (22).

2. The multi-component supercritical thermal fluid generation system with segmented air supply according to claim 1, wherein an outlet of the water tank (12) is communicated with the preheated water inlet of the multi-component supercritical thermal fluid generator body (22) through a preheated water pump (13).

3. The multi-component supercritical thermal fluid generation system with segmented air supply according to claim 1, wherein the outlet of the storage tank (4) is communicated with the material inlet through a material pump (5), and the material inlet is provided on a cooling wall (26) in the multi-component supercritical thermal fluid generator body (22).

4. The multi-component supercritical thermal fluid generation system with segmented air supply according to claim 3, wherein a multi-component supercritical thermal fluid generator cooling zone is located between an inner wall of the multi-component supercritical thermal fluid generator body (22) and the cooling wall (26), a supercritical water gasification heat absorption zone is located between the cooling wall (26) and the heat exchange sleeve (15), and an inner cavity of the heat exchange sleeve (15) is an oxidation reaction heat release zone.

5. The multi-component supercritical thermal fluid generation system with segmented air supply according to claim 4, wherein a first flow valve (3) is provided between an outlet of the air compressor (1) and the upper air inlet of the air delivery pipe (17), and a second flow valve (2) is provided between the outlet of the air compressor (1) and the lower air inlet of the air delivery pipe (17).

6. The multi-component supercritical thermal fluid generation system with segmented air supply according to claim 1, wherein the air supply unit is provided at the air delivery pipe (17) in the multi-component supercritical thermal fluid generator body (22), and the air supply unit comprises a first air outlet (18), a second air outlet (19), a third air outlet (20) and a fourth air outlet (21) provided at the air delivery pipe from top to bottom (17) in sequence.

7. The multi-component supercritical thermal fluid generation system with segmented air supply according to claim 1, wherein the air supply unit is connected with an upper air inlet and a lower air inlet of the multi-component supercritical thermal fluid generator body (22) through the two outlets of the air compressor (1), and the air supply unit comprises an upper air outlet and a lower air outlet formed inside the multi-component supercritical thermal fluid generator body (22).

8. The multi-component supercritical thermal fluid generation system with segmented air supply according to claim 1, wherein the air supply unit is in a form of an air spiral delivery pipe in the heat exchange sleeve (15), and there are several air spiral delivery pipes which are uniformly distributed on a central axis of the heat exchange sleeve (15).

9. The multi-component supercritical thermal fluid generation system with segmented air supply according to claim 1, wherein an outer wall of the multi-component supercritical thermal fluid generator body (22) is provided with a first auxiliary heating device (23), a second auxiliary heating device (24) and a third auxiliary heating device (25) from top to bottom in sequence.

10. A multi-component supercritical thermal fluid generation method with segmented air supply using the system according to claim 1, comprising the following steps: 1) preparing materials by a material preparation device, and then feeding prepared materials into a material storage tank (4); 2) closing a high temperature stop valve (8); 3) transporting water in the water tank (12) by the preheated water pump (13) and the water flowing into a multi-component supercritical thermal fluid generator cooling zone; the preheated water flowing out of the preheated water outlet of the multi-component supercritical thermal fluid generator body (22) flowing into the supercritical water gasification heat absorption zone through the heat exchanger (6) and the spiral pipe (16); the system adjusting a system pressure through a back pressure valve (10) so that the system pressure is stably maintained above a supercritical pressure; 4) starting the first auxiliary heating device (23), the second auxiliary heating device (24) and the third auxiliary heating device (25), and the cold water delivered by the preheated water pump (13) passing through the multi-component supercritical thermal fluid generator cooling zone, the heat exchanger (6) and the spiral pipe to be heated to a supercritical state; 5) transporting the materials stored in the storage tank (4), after pressure boost by the material pump (5), to the supercritical water gasification heat absorption zone where supercritical water gasification reaction occurs; a mixture of gas products and supercritical water produced by the reaction entering the heat exchanger (6) through a product outlet of the multi-component supercritical thermal fluid generator body (22) to exchange heat, then entering the cooler (9) to be cooled, and finally entering the gas-liquid separator (11) for gas-liquid separation; wherein separated gas products are recycled, and separated liquid returns to the water tank (12); 6) starting the air compressor (1) and opening the first flow valve (3) or the second flow valve (2) after the whole system runs continuously and stably for a period of time, wherein the air in the air compressor (1) passes through the air supply unit and undergoes oxidation exothermic reactions with the supercritical water gasification product H.sub.2 in a reaction cavity enclosed by the heat exchange sleeve (15); transferring the released heat to the supercritical water gasification heat absorption zone enclosed by the cooling wall (26) and the heat exchange sleeve (15) by the heat exchange sleeve (15), so as to achieve the purpose of energy coupling and matching between the supercritical water gasification heat absorption zone and the oxidation reaction heat release zone; with the progress of the reaction, gradually increasing an air flow rate to a certain constant value, and meanwhile reducing the heating powers of the first auxiliary heating device (23), the second auxiliary heating device (24) and the third auxiliary heating device (25) until heating is completely stopped, so as to achieve self-heating of the system and keeping the system running continuously and stably; 7) closing the back pressure valve (10) and opening the high-temperature stop valve (8) after the multi-component supercritical thermal fluid generation system runs continuously and stably for a period of time, so that the multi-component supercritical thermal fluid generated by the system is continuously injected into an oil layer through the multi-component supercritical thermal fluid injection well (7); and 8) discharging inorganic salts precipitated in the reaction process from the multi-component supercritical thermal fluid generator regularly through the slag discharge lock hopper (14) to prevent blockage in the multi-component supercritical thermal fluid generator.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0031] FIG. 1 is a schematic structural diagram of the present disclosure.

[0032] FIG. 2 is a structural diagram of Embodiment 1 of the present disclosure.

[0033] FIG. 3 is a structural diagram of Embodiment 2 of the present disclosure.

[0034] In the figures: 1—Air compressor; 2—Second flow valve; 3—First flow valve; 4—Storage tank; 5—Material pump; 6—Heat exchanger; 7—Multi-component thermal fluid injection well; 8—High temperature stop valve; 9—Cooler; 10—Back pressure valve; 11—Gas-liquid separator; 12—Water tank; 13—Preheated water pump; 14—Slag discharge lock hopper; 15—Heat exchange sleeve; 16—Spiral pipe; 17—Air delivery pipe; 18—First air outlet; 19—Second air outlet; 20—Third air outlet; 21—Fourth air outlet; 2—Multi-component thermal fluid generator body; 23—First auxiliary heating device; 24—Second auxiliary heating device; 25—Third auxiliary heating device; 26—Cooling wall.

DESCRIPTION OF EMBODIMENTS

[0035] The present disclosure will be further described below in detail with reference to the drawings:

[0036] Referring to FIG. 1, a continuous multi-component supercritical thermal fluid generating self-heating system of the present disclosure includes a multi-component supercritical thermal fluid generator body 22, a heat exchanger 6, a cooler 9, a gas-liquid separator 11, a storage tank 4, a slag discharge lock hopper 14, a heat exchange sleeve 15, a spiral pipe 16, a first auxiliary heating device 23, a second auxiliary heating device 24, a third auxiliary heating device 25, an air delivery pipe 17, an air compressor 1 and a water tank 12.

[0037] The outlet of the water tank 12 is communicated with the preheated water inlet of the multi-component supercritical thermal fluid generator body 22, the preheated water outlet of the multi-component supercritical thermal fluid generator body 22 is communicated with the cold fluid inlet of the heat exchanger 6, the cold fluid outlet of the heat exchanger 6 is communicated with the inlet of the spiral pipe 16, the outlet of the spiral pipe 16 is communicated with the preheated water inlet of the heat exchange sleeve 15, and the outlet of the storage material 4 is communicated with the material inlet of the multi-component supercritical thermal fluid generator body 22; the outlet of the compressor 1 is communicated with the upper air inlet and the lower air inlet of the air delivery pipe 17, the product outlet of the multi-component supercritical thermal fluid generator body 22 is communicated with the thermal fluid inlet of the heat exchanger 6, the slag outlet of the lower part of the multi-component supercritical thermal fluid generator body 22 is communicated with the inlet of the slag discharge lock hopper 14, the thermal fluid outlet of the heat exchanger 6 is communicated with the inlet of the cooler 9 and the inlet of the multi-component supercritical thermal fluid injection well 7, the outlet of the cooler 9 is communicated with the inlet of the gas-liquid separator 11, and the liquid product outlet of the gas-liquid separator 11 is communicated with the inlet of the water tank 12.

[0038] The multi-component supercritical thermal fluid generator body 22 is internally provided with an air supply unit, so as to realize segmented air supply in the multi-component supercritical thermal fluid generator body 22.

[0039] The outlet of the water tank 12 is communicated with the preheated water inlet of the multi-component supercritical thermal fluid generator body 22 through the preheated water pump 13; the outlet of the storage tank 4 is communicated with the material inlet of the cooling wall 26 through the material pump 5; a first flow valve 3 and a second flow valve 2 are respectively arranged between the outlet of the air compressor 1 and the upper air inlet and the lower air inlet of the air delivery pipe 17; a back pressure valve 10 is arranged between the cooler 9 and the gas-liquid separator 11; a high-temperature stop valve 8 is arranged between the heat exchanger 6 and the multi-component supercritical thermal fluid injection well 7; a first auxiliary heating device 23, a second auxiliary heating device 24, and a third auxiliary heating device 25 are arranged on the outer wall of the multi-component fluid generator body 22. The air supply unit is arranged on the air delivery pipe (17) in the multi-component supercritical thermal fluid generator body 22. The air supply unit is composed of a first air outlet 18, a second air outlet 19, a third air outlet 20 and a fourth air outlet 21 which are sequentially arranged on the air delivery pipe 17 from top to bottom.

[0040] The multi-component supercritical thermal fluid generation method with segmented air supply of that application includes the following step:

[0041] 1) Preparing materials by a material preparation device, and then feeding the prepared materials into a material storage tank 4.

[0042] 2) Closing a high temperature stop valve 8.

[0043] 3) Transporting water in the water tank 12 by the preheated water pump 13 and the water flowing into the multi-component supercritical thermal fluid generator cooling zone; the preheated water flowing out of the preheated water outlet of the multi-component supercritical thermal fluid generator body 22 flowing into the supercritical water gasification heat absorption zone through the heat exchanger 6 and the spiral pipe 16; the system adjusting a system pressure through a back pressure valve 10 so that the system pressure is stably maintained above a supercritical pressure.

[0044] 4) Starting the first auxiliary heating device 23, the second auxiliary heating device 24 and the third auxiliary heating device 25, and the cold water delivered by the preheated water pump 13 passing through the multi-component supercritical thermal fluid generator cooling zone, the heat exchanger 6 and the spiral pipe to be heated to a supercritical state.

[0045] 5) Transporting the materials stored in the storage tank (4), after pressure boost by the material pump 5, to the supercritical water gasification heat absorption zone for supercritical water gasification reaction; a mixture of gasification products and supercritical water produced by the reaction entering the heat exchanger 6 through a product outlet of the multi-component supercritical thermal fluid generator body 22 for heat exchange, then entering the cooler 9 for further cooling, and finally entering the gas-liquid separator 11 for gas-liquid separation. The separated gas products are recycled, and the separated liquid is returned to the water tank 12.

[0046] 6) After the whole system runs continuously and stably for a period of time, the air compressor 1 is started and the first flow valve 3 or the second flow valve 2 is opened, the air in the air compressor 1 passes through the air supply unit and undergoes an exothermic oxidation reaction with a supercritical water gasification product H.sub.2 through the air supply unit in a reaction cavity enclosed by the heat exchange sleeve 15; the released heat by oxidation reaction is transferred to the supercritical water gasification heat absorption zone enclosed by the cooling wall 26 and the heat exchange sleeve 15 by the heat exchange sleeve 15, so as to achieve the purpose of energy coupling and matching between the supercritical water gasification heat absorption zone and the oxidation reaction heat release zone. As the reaction occurs, an air flow rate to a certain constant value gradually increases, and meanwhile the heating powers of the first auxiliary heating device 23, the second auxiliary heating device 24 and the third auxiliary heating device 25 reduce until heating is completely stopped, thus realizing the self-heating of the system and keeping the system running continuously and stably.

[0047] 7) After the multi-component supercritical thermal fluid generation system runs continuously and stably for a period of time, closing the back pressure valve 10 and opening the high-temperature stop valve 8, so that a multi-component supercritical thermal fluid generated by the system can be continuously injected into an oil layer through the multi-component supercritical thermal fluid injection well 7.

[0048] 8) Discharging inorganic salts precipitated in the reaction process from the multi-component supercritical thermal fluid generator regularly through the slag discharge lock hopper 14 to prevent blockage in the multi-component supercritical thermal fluid generator.

[0049] During operation, the present disclosure can flexibly select upper air entry or lower air entry by adjusting the first flow valve 3 and the second flow valve 2. The present disclosure has wide material applicability, and can directly use offshore platform organic wastewater such as heavy oil production water as materials to realize harmless treatment and resource utilization of offshore platform organic wastewater.

[0050] According to the present disclosure, the multi-component supercritical thermal fluid generator cooling zone enclosed by the multi-component supercritical thermal fluid generator 22 and the cooling wall 26 can preheat the cold water delivered from the water tank 12 through the preheated water pump 13, reduce the wall temperature of the multi-component supercritical thermal fluid generator 22, and reduce the material requirements for the multi-component supercritical thermal fluid generator 22. Through reasonable energy coupling arrangement of the supercritical water gasification heat absorption zone and hydrogen-oxygen heat release zone, the self-heating of the multi-component supercritical thermal fluid generation system can be realized, and the high equipment investment and operation cost caused by electric heating equipment can be reduced.

[0051] The auxiliary heating device of that application can also be one or more heating mode such as solar heating, electromagnetic wave heating, industrial waste heat and the like. Of course, its purpose is to make the water entering the multi-component supercritical thermal fluid generator 22 reach the supercritical state, and its form is not limited to any mode.

Embodiment 1

[0052] As shown in FIG. 2, in the embodiment, the multi-component supercritical thermal fluid generator main body 22 is internally provided with a heat exchange sleeve 15; the preheated water inlet of the multi-component supercritical thermal fluid generator body 22 is communicated with the cold fluid outlet of a heat recovery and temperature regulation device 6, and the cold fluid inlet of the heat recovery and temperature regulation device 6 is communicated with the outlet of the water tank 12; the material inlet of the multi-component supercritical thermal fluid generator body 22 is connected with the storage tank 4; the product outlet at the upper part of the multi-component supercritical thermal fluid generator body 22 is communicated with the thermal fluid inlet of the heat recovery and temperature regulation device 6, and the slag outlet at the lower part of the multi-component supercritical thermal fluid generator body 22 is connected with the slag discharge device 14; the thermal fluid outlet of that heat recovery and temperature regulation device 6 is divided into two paths, one path is communicated with the gas-liquid separator 11 through the cooler 9, and the other path is communicated with the multi-component supercritical thermal fluid injection well 7; the liquid product outlet of the gas-liquid separator 11 is communicated with the inlet of the water tank 12.

[0053] In this embodiment, the upper air inlet and the lower air inlet of the multi-component supercritical thermal fluid generator body 22 are both connected with the outlet of the air compressor 1; the air of the air compressor 1 evenly reacts with the supercritical water gasification product H2 through the upper air inlet and the lower air inlet in the reaction cavity enclosed by the heat exchange sleeve 15.

[0054] The air supply unit of this embodiment is connected to the upper air inlet and the lower air inlet of the multi-component supercritical thermal fluid generator body 22 through the outlets at both ends of the air compressor 1. The air supply units are the upper air outlet and the lower air outlet formed inside the multi-component supercritical thermal fluid generator body 22. The segmented supply of air in the multi-component supercritical thermal fluid generator body 22 is realized.

Embodiment 2

[0055] As shown in FIG. 3, the heat exchange sleeve 15 is arranged in the multi-component supercritical thermal fluid generator body 22, and the heat exchange sleeve 15 is internally provided with a plurality of air spiral delivery pipes, which are evenly distributed on the central axis of the heat exchange sleeve 15, and the preheated water heat exchange spiral pipe 16 runs through the heat exchange sleeve 15, and the preheated water heat exchange spiral pipe 16 is wound around the outer walls of the air spiral delivery pipes.

[0056] In this embodiment, the air supply unit takes the form of air spiral delivery pipes in the heat exchange sleeve 15, and there are several air spiral delivery pipes, which are evenly distributed on the central axis of the heat exchange sleeve 15, so as to realize the segmented air supply in the multi-component supercritical thermal fluid generator body 22. The above contents only illustrate the technical idea of the present disclosure, and but are not intended to limit the protection scope of the present disclosure. Any changes made on the basis of the technical solution according to the technical idea put forward by the present disclosure fall within the protection scope of the claims of the present disclosure.